Question

Which among the following numbers is not a perfect square?

• A. Cubes
• B. Squares
• C. Irrational Numbers
• D. None of these.

Answer 1

The correct option is D

None of these.

Here

$\sqrt{4}$ = $\sqrt{2^2}$ = 2

$\sqrt{9}$ = $\sqrt{3^2}$ = 3

$\sqrt{16}$ = $\sqrt{4^2}$ = 4

All three are perfect squares.

$\sqrt{24}$, is not a perfect square and hence the answer.